Grinding or crushing head.



l No. '745;639. PATETED DBG. 1, 190s.

" V. W. MASON, JR.

GRINDING 0R GRUSHING HEAD.

vAPPLIf/AIIQN FILED APB. 18, IQOL 4 N0 MODEL. l y 2 SHEETS-SHEET 1`Jai/265s es:

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PATENTED DEC. l, 1903.

Nq. 746,639. .Y

` .V. W. MASONQJR.

GRINDING 0R GRUSHING HEAD.

l APPLICATION Puma APR. 1s. 1901. No MODEL. 2 SHEETS-SHEET 2.

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` www Y @@Q VOLNEY W. MASON, JR.

Patented December 1, 1903.

PATENT OFFICE OF NEW YORK, N. Y.

GRINDING on CRUSHING HEAD.

SPECIFICATION Application filed April lll, 190i.

To all whom, it 1er/ty concern;

Be it known that I, VOLNEY W. MASON, Jr. of the city, county, and Stateof New York, have invented an Improvement in Grinding or Crushing Heads,of which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention has for its object to improve the construction olgrindingor crushing heads especially adapted for gyratory crushers, althoughalso adapted for other uses, to the end that the same may beconstructed, essen! tially, of manganese steel and the Wearing portionsrenewable whenever desired.

The invention-consists in a head comprising a core and a number ofexternal segmental plates mounted thereon and secured thereto to therebycompletely surround the core, said core being composedof any ordinarysteel or iron, and said segmental'plates being composed of manganesesteel, and also in means for securing said segmental plates to the core.

Figure 1 shows in plan viewand partial section a grinding or crushinghead embodying this invention. Fig. 2 is a vertical section ot" thesaine, taken on the dotted line 2 2. Fig. 3 is a side elevation of thecore. Fig. 4 is a' detail of one of the segmental plates. Fig. 5 is aside elevation and partial section of the grinding and crushing head andwith a sufficient portion of a CrusherY to illustrate my invention.

The core u, which is herein shown for the sake of illustrating myinvention, is madeconical and also hollow; yet it may be made of anyother suitable shape and adapted to be mounted on a spindle or shaft a5.The core avis formed or provided with a plurality of like dovetailedgrooves a', extending from one end to a point near the opposite end-as,for instance, from the bottom to a point near the top-the upper end ofeach groove forming an abutting shoulder near the top of the core. Thesegrooves may and preferably will be made a little wider at one end thanat the other, being herein shown as made wider at the bottom than at thetop. The core o, is also formed or -provided With a plurality ofkey-receiving recesses a2, one of which crosses each groove a atsubstantially right angles ,grooves a.

at a point near the bottom or end of the core,

forming part of Letters Patent No. 745,639, dated December 1, 1903.

Serial No. 5 6.358. (No modeLl lthe keys may be introduced intoorvreinoved from thevrecesses.

b'represents one of the'external segmental plates, of which there may beany desired number, yet corresponding to the number of i These segmentalplates are made of manganese steel; yet of course they may be made ofanyothersuitable material. These segmental plates are herein made Wider atthe bottom-than at the top to specially adapt them to be placed on aconical core, and they are made as long as the core and are adapted tobe placed upon the core, so as to surround or inclose it. Y

Each segment h is formed or provided on its inner side or face Withadovetailed rib Z7', extending from the bottom to a point near the top totit one of the dovetailed grooves a in the core. At a point near thebottom or end of each segment b a key-receiving recess b2 is formed orprovided in the rib b', which crosses said rib at substantially rightangles and which is adapted to be disposed opposite one of thekey-receiving recesses in the core When the segmentis placed in positionon the core. The dovetailed rib h is made a little wider at the bottomor one end than at the top or other end.

The segmental plates b are driven onto the core, the ribs h entering andsnugly fitting the grooves d', and the upper ends of said ribs abutagainst the shoulders at the upper ends off the grooves. Wedge-shapedkeys c o are inserted through the openings oand properly placed in thekey-receiving recesses in substantially horizontal position, beingthereby transversely disposed relative to the ribs h'. Said keys lockthesegmen'ts against displacement on the core. After the keys c o havebeen introduced the openings as are closed by pouring molten zinc or anyother suitable metal thereinto, which serves to not only close saidopenings, but `primf-irily to hold the keys cc securely in place. Thekeys c c are made wedge-shaped, so that they may be firmly secured inplace in the key-receiving recesses by being vcrowded toward each otherin the direction of their length before being locked in by the moltenzinc. The

wedge-shaped keys are not alone depended upon to hold thecircumferential plates against displacement, but when locked in positionby the molten zinc they act effectively. They are only firmly secured byfriction until the molten zinc is introduced, when they will bepositively held in the position that they occupy by the molten zinc thusintroduced. In case it is desired to remove the segmental plates or anyof them the zinc and the keys will be removed and then the segmentalplate or plates may be driven 0E the core.

I claiml. Agrindingorcrushingheadcomprisinga core having a plurality oflongitudinal dovetailed grooves therein which extend from the bottom toa point short of the top, and a corresponding number of externalsegmental plates mounted thereon, having longitudinal dovetailed ribsprojecting from the inner faces thereof, which extend from the bottom toa point short of the top, and which enter said grooves, and a lockingdevice for each segmental plate, substantially as described.

2. Agrindingorcrushingheadcomprisinga core having a plurality oflongitudinal dovetailed tapering grooves therein, and acorrespondingnumberofexternal segmental plates thereon, havinglongitudinal dovetailed tapering ribs projecting from the inner facesthereof, which extend from the bottom to a point short of the top, andwhich enter said grooves, and an independent locking device for eachsegmental plate, substantially as described.

3. A grinding or crushing head comprising a core having a plurality ofdovetailed grooves therein, each groove having a key-receiving recesscrossing it at right angles, and a plurality of external segmentalplates mounted on said core having dovetailed ribs projecting from theinner faces thereof, adapted to enter said grooves and havingkey-receiving recesses crossing said ribs at points opposite thekey-receiving recesses in the core, a removable key contained in eachkey-receiving recess in the core for locking the segmental platesagainst displacement, and a passage leading to each key-receiving recessfor the introduction and removal of the keys, substantially asdescribed.

4. Agrinding or crushinghead comprisinga core having aplurality ofdovetailed grooves therein, a corresponding number of external segmentalplates mounted on said core having dovetailed ribs projecting from theinner faces thereof adapted to enter said grooves, a removabletransversely-disposed key interposed between each segmental plate andthe core for locking said segmental plates separately againstdisplacement, and passages for the introduction and removal of saidkeys, substantially as described.

5. Agrinding or ciushinghead,comprisinga core having a plurality ofdovetailed grooves therein and a corresponding number of externalsegmental plates mounted on said core having dovetailed ribs adapted toenter said grooves, a transverselydisposed key interposed between eachsegmental plate and the core for locking said segmental plates againstdisplacement, passages for the introduction and removal of the keys, andmeans for holding said keys in place, substantially as described.

6. A grinding orcrushing head,co mprising a core having a plurality ofdovetailed grooves therein, a key-receiving recess crossing saidgroove'and a passage leading to each recess, a plurality ofsegmental'plates having dovetailed ribs to t said grooves, and akey-receiving recess crossing each rib at a point opposite thekey-receiving recess in the core, keys contained in the key receivingrecess for locking the segmental plates in place on the core, and meansfor holding the keys in place, substantially as described.

7. Agrindingor crushinghead,comprisinga core having a plurality ofdovetailed grooves therein, cach groove having a key-receiving recesscrossing it at right angles and a pluralityof external segmental platesmounted on said core having dovetailed ribs project` ing from the innerfaces thereof adapted to enter said grooves having key-receivingrecesses crossing said ribs at points opposite the key-reciving recessesin the core, a pair `of Wedge-shaped keys contained in each recess forlocking said segmental plates against displacement, and means forholding said keys in place, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

VOLNEY W. MASON, JR.

1 Witnesses:

B. J. Novus, J oHN W. DEcRoW.

IOC

